Shimano Ultegra 8170 Di2 2 x 12-Speed Front Shifter and Hydraulic Disc Brake Kit

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Designed for the 2 x 12-speed Shimano drivetrain, this Ultegra 8170 Di2 Front Shifter and Hydraulic Disc Brake Kit brings enhanced modulation and optimized brake control to every ride.


  • This J-Kit is a complete, pre-bled set with front (left) Ultegra ST-R8170 Di2 dual-control lever, BR-R8170 hydraulic disc brake caliper, hydraulic hoses and fittings
  • Ultegra ST-R8170 brake lever brings enhanced modulation and optimized brake control to every ride by employing Shimano SERVO-WAVE technology
  • The Di2 platform—used on both Dura-Ace and Ultegra—untethers the shifters while delivering fast, reliable wireless shifting
  • Wireless connection provides a clean cockpit, enhances the aerodynamic effect and offers easy maintenance; plus the shifting is customizable via the Shimano E-Tube Project app
  • High electronic energy efficiency means you get 1.5 to 2 years of battery life with the easy-to-change CR1632 shifter batteries (included)
  • Raised hood peak improves lever ergonomics; ergonomic engineering has been refined with feedback from pro cyclists
  • Lever offers light, smooth action and is compatible with wireless or wired connection
  • Ultegra BR-R8170 disc brake caliper brings a new level of control to road cycling with enhanced modulation and a quicker initial braking point
  • Despite its smaller construction, the caliper system is quieter than ever and easier to maintain
  • 10% wider pad clearance decreases brake noise, and the expanded braking control area offers enhanced modulation
  • Maintenance-friendly bleeding process


View the Shimano Di2 Product LineView all Shimano Disc Brake Calipers

Technical Specs

Best Use

Road Cycling

Brake Mount

Flat Mount

Number of Pistons

2 Pistons

Brake Position


Brake Lever Position


Adjustable Contact Point


Adjustable Reach


Hydraulic Fluid Type

Mineral Oil

Hydraulic Hose Length

1000 millimeters

Pad Compound

Organic (Resin)




374 grams

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